Spring-tooth harrow



I H. GALE. "Spring-Tooth Harrow.

No. 2'2s;os4. Patented M'ay 25.1880.

UNITED STATES I PATENT OFFICE.

HORATIO GALE, OF ALBION, MICHIGAN.

SPRING-TOOTH HARROW.

SPECIFICATION forming part of Letters Patent No. 228,054, dated May 25, 11880.

To all whom it may concern:

Be it known that I, HORATIO GALE, of Albion, in the county of Calhoun and State of Michigan, have invented an Improvement in Spring-Tooth Harrows, of which the following is a specification.

The nature of this invention relates to new and useful improvements in the structure and operation of spring-tooth barrows, by means of which all the teeth may be set simultaneously at any desired pitch or angle to suit the varying conditions of soil where it is to be used;

and thejnvention consists in the peculiar con struction and operation of the various parts, all as more fully hereinafter described.

In the drawings, Figure l is a perspective view with one wheel removed, and showing the teeth as elevated for transportation. Fig. 2 is a vertical cross-section, showing the teeth as lowered for operation, and also showing, in dotted outline, the teeth as extended forward for the purpose of securing greater pitch.

In the accompanying drawings, which form a part of this specification, A represents a frame, to which the tongue B is secured, and to which also the seat G is attached. The timbers D, which form the sides of this frame, project to the rearward, as shown. To the outer face ofeach of these timbers is secured a plate, E, from which projects the arm F, upon which the wheel Grotates. This plateis secured at one end by a bolt, to, as shown. The opposite end of this plate is widened and provided with a'series of holes, b, drilled to form a segment of a circle of which the bolt a is the pivot. A single bolt, 0, through one of these holes and the adjacent timber enables the operator at will to .raise or lower the frame.

J ournaled at each end to the timbers D are the bars H, to which are secured, at overlapping intervals, the spring-teeth I. Preferably the bar Application filed January 8, 1880.

H, which is the rear bar of the implement, is journaled at the outer end of the timbers D, in order that a tooth may be secured at each end outside of the hearing. A notched quadrant is secured to the frame. A crank-arm, L, is secured to each of the tooth-carrying bars, the front one of such crank-arms terminating in a lever, M, which carriesa spring-dog, N, which engages with the notches in the quadrant.

A connecting-rod, O, is pivotally secured to each of the crank-arms, so that by one motion of the lever, forward or back, the desired pitch or elevation of all the teeth is simultaneously secured.

1 am aware that pivoted harrow-tooth bars have heretofore been employed in connection with bearing'wheels, whereby the inclination of the teeth may be changed and at the same time the barrow-frame raised or lowered and I am also aware that in wheel-plows the plowframe can be adjusted "ertically on the wheels and the angle of the plow with the frame changed by independent adjustments, and I therefore'lay no claim to such invention.

What I claim as my invention is In a sulky-harrow, the combination of a frame, D, vertically adjustable on the wheels Gr, with a harrow composed of a series of bars, I-I, journaled in the frame D, and armed with spring-teeth and connected together by a rod, 0, for adjusting the inclination of the teeth,

and the two adjustments being independent of each other, whereby the frame can he raised and lowered as desired and the angle of inclination of the harrow-teeth be varied, substantially as described.

HORATIO GALE.

Witnesses:

H. S. SPRAGUE, A. BARTHEL. 

